What is CVE-2026-32235?

CVE-2026-32235 is a medium-severity vulnerability in @Backstage Plugin-auth-backend, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.9/10. Published 2026-03-12.

How severe is CVE-2026-32235?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Open Redirect in @Backstage Plugin-auth-backend

CVE-2026-32235

Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dyn…

Vulnerability class: Open Redirect

EPSS: 0.000 (10.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N.

Affected products

@Backstage Plugin-auth-backend — versions < 0.27.1

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

https://github.com/backstage/backstage/security/advisories/GHSA-wqvh-63mv-9w92 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-32235?: CVE-2026-32235 is a medium-severity vulnerability in @Backstage Plugin-auth-backend, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.9/10. Published 2026-03-12.
How severe is CVE-2026-32235?: Medium severity. CVSS v3 base score is 5.9 out of 10.